OBD I codes for 4.x Engines
To retrieve the codes, Turn the ignition on. Press both OFF and WARMER on the climate control at the same time until the segment check displays. The codes will now be displayed. When the codes are finished displaying, the display will show .7.0 Press OFF and HI to clear ECM codes, or OFF and LO to clear BCM codes. Press AUTO to exit (twice on Eldorados) or turn the ignition off.
Common Codes For OBD I 4.x Engines
E12 - No Distributor Signal E13 - Oxygen Sensor Not Ready E14 - Shorted Coolant Temp. Sensor E15 - Open Coolant Temp. Sensor E16 - Generator Voltage Out Of Range E17 - Shorted Crank Signal Circuit E18 - Open Crank Signal Circut E19 - Shorted Fuel Pump Feedback Signal E20 - Open Fuel Pump Circut Feedback Signal E21 - Shorted TPS Signal E22 - Open TPS Signal E23 - EST Signal Problem E24 - VSS Signal Problem E25 - EST Circut Problem in Bypass Mode E26 - Shorted Throttle Switch Signal E27 - Open Throttle Switch Signal E28 - Open Third Or Fourth Gear Circut E29 - Shorted Fourth Gear Circut E30 - ISC RPM Out Of Range E31 - Shorted MAP Sensor Signal E32 - Open MAP Sensor Signal E33 - MAP/BARO Sensor Correlation E34 - MAP Sensor Signal Out Of Range E35 - Shorted BARO Sensor Circut E36 - Open BARO Sensor Circut E37 - Shorted MAT Sensor Signal E38 - Open MAT Sensor Signal E39 - VCC Engagement Problem E40 - Open Power Steering Pressure Switch Signal E41 - Cam Sensor Signal Problem E42 - EST Circut Open E43 - ESC Circut Problem E44 - Oxygen Sensor Signal Lean E45 - Oxygen Sensor Signal Rich E46 - Right to left bank fueling difference (Thanks HUF!) E47 - BCM-PCM Data Problem E48 - EGR System Problem E49 - A.I.R. Control Problem E51 - ECM PROM Error E52 - PCM Memory Reset (See Note) E53 - Distributor Signal Interrupt E55 - Closed Throttle Angle Out Of Range E58 - PASS-Key Control Problem E59 - VCC Temperature Sensor Circut Problem E60 - Cruise- Transaxle Not In Drive E61 - Cruise Vent Solenoid Problem E62 - Cruise Vacuum Solenoid Problem E63 - Cruise Set vs. Vehicle Speed Too High E64 - Cruise- Vehicle Acceleration Too High E65 - Cruise Servo Position Sensor Signal Problem E66 - Cruise- Engine RPM Too High E67 - Cruise Set/Coast or Resume/Accel Switch Shorted E68 - Cruise Command Problem E70 - Intermittent TPS Signal E71 - Intermittent MAP Sensor Signal E73 - Intermittent Coolant Temp. Sensor Signal E74 - Intermittent MAT Sensor Signal E75 - Intermittent VSS Sensor Signal E80 - Fuel System Rich E85 - Idle Throttle Angle Too High E90 - VCC Brake Switch Signal Problem E91 - PRNDL Switch Problem E92 - Heated Windshield Request Problem E96 - Torque Convertor Overstress E97 - P/N to D/R at High Throttle Angle E98 - High RPM P/N to D/R in ISC Range E99 - Cruise Servo Apply Problem
BCM Codes*************
F10 - Outside Air Temperature Sensor Circuit F11 - A/C High Side Temperature Sensor Circuit F12 - A/C Low Side Temperature Sensor Circuit F13 - In-Car Temperature Sensor Circuit F14 - Diesel Coolant Sensor Circut F15 - Solar Sensor Circuit Failure F19 - Blower Motor Failure F30 - Display Panels to BCM Data Problem F31 - Display Panels to BCM Data Problem F32 - BCM-ECM Data Problem F40 - Air Mix Door Problem F41 - Cooling Fans Problem F46 - Low Refrigerant Charge F47 - Low Refrigerant Charge F48 - Refrigerant System Problem F49 - High Temperature Clutch Disengage F50 - Coolant Temp. too High F51 - BCM PROM Error Indicator
Additional Eldorado/Seville BCM codes:
B110 - Outside Temperature Sensor Circuit B111 - A/C High Side Temperature Sensor Circuit B112 - A/C Low Side Temperature Sensor Circuit B113 - In Car Temperature Sensor Circuit B115 - Sunload Sensor Circuit B119 - Twilight Photocell Circuit B120 - Twilight Delay Pot Circuit B120 / B122 - Twilight Delay & Panel Dimming B121 - Twilight Enable Switch Circuit B122 - Panel Dimming Switch Pot Circuit B123 - Courtesy Lamps Panel Switch Circuit B333 - Loss of SIR Data B334 - Loss of ECM Serial Data B335 - Loss of CCDIC Data B336 - Loss of IPC Serial Data B337 - Loss of HVAC Programmer Data B339 - Ride Control Serial Communication Failure B409 - Charging System Failure B410 - Charging System Circuit B411 or B412 - Battery Voltage Too High or Too Low B420 - Relay Circuits B421 - BCM Output Driver Failure (2) B440 - Air Mix Valve (Door) Circuit Problem B441 - Cooling Fans Problem B446 / B447 - Low Refrigerant Pressure B448 - Low Refrigerant Pressure B449 - High Side Temperature Too High B450 - Coolant Temperature Too High B480 - Loss of ABS/TCS Communication (ABS System) B481.. ABS (fault) B483.. ABS/TCS Disabled B552 - Keep Alive Memory Error B556 - Odometer (EE) PROM Error L110 - LSP Communication Faliure (Allante) L441 - Lighting System Low Voltage Warning (Allante)
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